Helcurt

Helcurt remains in Prowler state until spotted by the enemy team, gaining 15% extra Movement Speed, and continuously regenerating (+30% Total Physical Attack) HP if he has not dealt any damage.
He gains 50% extra Attack Speed and 50% extra Movement Speed (decreasing over time) for 4s upon being spotted and leaves Prowler state 0.75s later.
Any hero killed after being hit by Helcurt leaves a dark fog that explodes and spreads with a cooldown of 10s. Helcurt Conceals himself while within the dark fog.

Passive: When Helcurt is in the Prowler state, Terrify also affects enemy heroes hit and briefly reveals them. Its cooldown decreases 3 times as fast as normal.
Active: Helcurt blinks to the target location and deals 150 (+70% Total Physical Attack) Physical Damage to enemies in the area, reducing their Movement Speed by 60% for 0.75s.

Passive: Helcurt gains 1 Deadly Stinger for every 1.5s spent in Prowler state or on each Basic Attack. Up to 5 Deadly Stingers can be stored.

Active: Helcurt fires all Deadly Stingers forward, each dealing 180 (+50% Extra Physical Attack) Physical Damage to enemies (minions and creeps take only 70% of the damage).
Deadly Stinger counts as a Basic Attack but cannot Crit.

Helcurt summons the Dark Night, reducing all enemies' sight range and making them lose sight of their allies for 3s. During Dark Night, Helcurt gains 40% extra Movement Speed.

The Dark Night makes it easier for Helcurt to leave enemies' sight range.